31213011032 has 32 divisors (see below), whose sum is σ = 68516370720. Its totient is φ = 13050735360.

The previous prime is 31213011031. The next prime is 31213011077. The reversal of 31213011032 is 23011031213.

It is a self number, because there is not a number n which added to its sum of digits gives 31213011032.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213011031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6794963 + ... + 6799554.

It is an arithmetic number, because the mean of its divisors is an integer number (2141136585).

Almost surely, 2^31213011032 is an apocalyptic number.

It is an amenable number.

31213011032 is an abundant number, since it is smaller than the sum of its proper divisors (37303359688).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31213011032 is a wasteful number, since it uses less digits than its factorization.

31213011032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13594571 (or 13594567 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 31213011032 its reverse (23011031213), we get a palindrome (54224042245).

The spelling of 31213011032 in words is "thirty-one billion, two hundred thirteen million, eleven thousand, thirty-two".